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202220100021 = 31911293142357
BaseRepresentation
bin1011110001010101000…
…0011101100110110101
3201022222001210110012010
42330111100131212311
511303121321200041
6232522034314433
720416126326552
oct2742520354665
9638861713163
10202220100021
1178840a7a205
1233237128a19
13160b926a624
149b04cb1a29
1553d8311a16
hex2f1541d9b5

202220100021 has 16 divisors (see below), whose sum is σ = 284069163200. Its totient is φ = 127604792448.

The previous prime is 202220099981. The next prime is 202220100091. The reversal of 202220100021 is 120001022202.

It is a de Polignac number, because none of the positive numbers 2k-202220100021 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 (202220100091) 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, 1506826 + ... + 1635531.

It is an arithmetic number, because the mean of its divisors is an integer number (17754322700).

Almost surely, 2202220100021 is an apocalyptic number.

It is an amenable number.

202220100021 is a deficient number, since it is larger than the sum of its proper divisors (81849063179).

202220100021 is a wasteful number, since it uses less digits than its factorization.

202220100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143508.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 202220100021 its reverse (120001022202), we get a palindrome (322221122223).

The spelling of 202220100021 in words is "two hundred two billion, two hundred twenty million, one hundred thousand, twenty-one".

Divisors: 1 3 19 57 1129 3387 21451 64353 3142357 9427071 59704783 179114349 3547721053 10643163159 67406700007 202220100021