121201011002020 has 48 divisors (see below), whose sum is σ = 259338837639168. Its totient is φ = 47563036626560.

The previous prime is 121201011002009. The next prime is 121201011002053. The reversal of 121201011002020 is 20200110102121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15961965 + ... + 22297675.

It is an arithmetic number, because the mean of its divisors is an integer number (5402892450816).

Almost surely, 2^{121201011002020} is an apocalyptic number.

121201011002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201011002020 is an abundant number, since it is smaller than the sum of its proper divisors (138137826637148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121201011002020 is a wasteful number, since it uses less digits than its factorization.

121201011002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6353820 (or 6353818 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121201011002020 its reverse (20200110102121), we get a palindrome (141401121104141).

The spelling of 121201011002020 in words is "one hundred twenty-one trillion, two hundred one billion, eleven million, two thousand, twenty".