120001211000020 has 48 divisors (see below), whose sum is σ = 290694522384000. Its totient is φ = 40758755773824.

The previous prime is 120001210999991. The next prime is 120001211000057. The reversal of 120001211000020 is 20000112100021.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 120001210999970 and 120001211000006.

It is a congruent number.

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, 4005365895 + ... + 4005395854.

It is an arithmetic number, because the mean of its divisors is an integer number (6056135883000).

Almost surely, 2^{120001211000020} is an apocalyptic number.

120001211000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120001211000020 is an abundant number, since it is smaller than the sum of its proper divisors (170693311383980).

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

120001211000020 is a wasteful number, since it uses less digits than its factorization.

120001211000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8010761872 (or 8010761870 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 120001211000020 its reverse (20000112100021), we get a palindrome (140001323100041).

The spelling of 120001211000020 in words is "one hundred twenty trillion, one billion, two hundred eleven million, twenty", and thus it is an aban number.