102001121111128 has 32 divisors (see below), whose sum is σ = 192788105698800. Its totient is φ = 50592581776512.

The previous prime is 102001121111093. The next prime is 102001121111129. The reversal of 102001121111128 is 821111121100201.

It is a super-2 number, since 2×102001121111128² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102001121111099 and 102001121111108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102001121111129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100883283 + ... + 101889346.

Almost surely, 2^{102001121111128} is an apocalyptic number.

It is an amenable number.

102001121111128 is a deficient number, since it is larger than the sum of its proper divisors (90786984587672).

102001121111128 is a wasteful number, since it uses less digits than its factorization.

102001121111128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202773139 (or 202773135 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 22.

Adding to 102001121111128 its reverse (821111121100201), we get a palindrome (923112242211329).

The spelling of 102001121111128 in words is "one hundred two trillion, one billion, one hundred twenty-one million, one hundred eleven thousand, one hundred twenty-eight".