2111121010020 has 48 divisors (see below), whose sum is σ = 6448515087168. Its totient is φ = 511786911360.

The previous prime is 2111121009973. The next prime is 2111121010091. The reversal of 2111121010020 is 200101211112.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2111121009978 and 2111121010005.

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, 1599333439 + ... + 1599334758.

It is an arithmetic number, because the mean of its divisors is an integer number (134344064316).

Almost surely, 2^{2111121010020} is an apocalyptic number.

2111121010020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111121010020 is an abundant number, since it is smaller than the sum of its proper divisors (4337394077148).

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

2111121010020 is a wasteful number, since it uses less digits than its factorization.

2111121010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3198668220 (or 3198668218 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2111121010020 its reverse (200101211112), we get a palindrome (2311222221132).

The spelling of 2111121010020 in words is "two trillion, one hundred eleven billion, one hundred twenty-one million, ten thousand, twenty".