121001021020010 has 128 divisors (see below), whose sum is σ = 232069234118400. Its totient is φ = 45354536478720.

The previous prime is 121001021019997. The next prime is 121001021020027. The reversal of 121001021020010 is 10020120100121.

It is a junction number, because it is equal to n+sod(n) for n = 121001021019973 and 121001021020000.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 400651382 + ... + 400953278.

It is an arithmetic number, because the mean of its divisors is an integer number (1813040891550).

Almost surely, 2^{121001021020010} is an apocalyptic number.

121001021020010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121001021020010 is a deficient number, since it is larger than the sum of its proper divisors (111068213098390).

121001021020010 is a wasteful number, since it uses less digits than its factorization.

121001021020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302296.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121001021020010 its reverse (10020120100121), we get a palindrome (131021141120131).

The spelling of 121001021020010 in words is "one hundred twenty-one trillion, one billion, twenty-one million, twenty thousand, ten".