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38900211211021 = 188011206903911
BaseRepresentation
bin10001101100001001010010…
…10001010101101100001101
312002201211020121021212122011
420312010221101111230031
520044320113032223041
6214422302121421221
711123306332425526
oct1066045121255415
9162654217255564
1038900211211021
111143853a114046
12444315603a811
1318923744a0634
14986acd0b184d
15476d3ca8be81
hex236129455b0d

38900211211021 has 4 divisors (see below), whose sum is σ = 38900418302944. Its totient is φ = 38900004119100.

The previous prime is 38900211211019. The next prime is 38900211211067. The reversal of 38900211211021 is 12011211200983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38900211211021 - 21 = 38900211211019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38900211214021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103263945 + ... + 103639966.

It is an arithmetic number, because the mean of its divisors is an integer number (9725104575736).

Almost surely, 238900211211021 is an apocalyptic number.

It is an amenable number.

38900211211021 is a deficient number, since it is larger than the sum of its proper divisors (207091923).

38900211211021 is a wasteful number, since it uses less digits than its factorization.

38900211211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207091922.

The product of its (nonzero) digits is 1728, while the sum is 31.

The spelling of 38900211211021 in words is "thirty-eight trillion, nine hundred billion, two hundred eleven million, two hundred eleven thousand, twenty-one".

Divisors: 1 188011 206903911 38900211211021