1210001211020 has 48 divisors (see below), whose sum is σ = 2904687148608. Its totient is φ = 414759809280.

The previous prime is 1210001211017. The next prime is 1210001211091. The reversal of 1210001211020 is 201121000121.

It is a junction number, because it is equal to n+sod(n) for n = 1210001210992 and 1210001211010.

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, 420671 + ... + 1611510.

It is an arithmetic number, because the mean of its divisors is an integer number (60514315596).

Almost surely, 2^{1210001211020} is an apocalyptic number.

1210001211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210001211020 is an abundant number, since it is smaller than the sum of its proper divisors (1694685937588).

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

1210001211020 is a wasteful number, since it uses less digits than its factorization.

1210001211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036450 (or 2036448 counting only the distinct ones).

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

Adding to 1210001211020 its reverse (201121000121), we get a palindrome (1411122211141).

The spelling of 1210001211020 in words is "one trillion, two hundred ten billion, one million, two hundred eleven thousand, twenty".