20101121021223 has 16 divisors (see below), whose sum is σ = 32486660236800. Its totient is φ = 12182497588440.

The previous prime is 20101121021171. The next prime is 20101121021269. The reversal of 20101121021223 is 32212012110102.

20101121021223 is a `hidden beast` number, since 201 + 0 + 11 + 210 + 21 + 223 = 666.

It is not a de Polignac number, because 20101121021223 - 2⁹ = 20101121020711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20101121021196 and 20101121021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101121021123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33840270783 + ... + 33840271376.

It is an arithmetic number, because the mean of its divisors is an integer number (2030416264800).

Almost surely, 2^{20101121021223} is an apocalyptic number.

20101121021223 is a deficient number, since it is larger than the sum of its proper divisors (12385539215577).

20101121021223 is a wasteful number, since it uses less digits than its factorization.

20101121021223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67680542179 (or 67680542173 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 20101121021223 its reverse (32212012110102), we get a palindrome (52313133131325).

The spelling of 20101121021223 in words is "twenty trillion, one hundred one billion, one hundred twenty-one million, twenty-one thousand, two hundred twenty-three".