1212021011020 has 48 divisors (see below), whose sum is σ = 2608487481600. Its totient is φ = 472797130176.

The previous prime is 1212021011017. The next prime is 1212021011057. The reversal of 1212021011020 is 201101202121.

It is a super-2 number, since 2×1212021011020² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 542920 + ... + 1648879.

It is an arithmetic number, because the mean of its divisors is an integer number (54343489200).

Almost surely, 2^{1212021011020} is an apocalyptic number.

1212021011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212021011020 is an abundant number, since it is smaller than the sum of its proper divisors (1396466470580).

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

1212021011020 is a wasteful number, since it uses less digits than its factorization.

1212021011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192494 (or 2192492 counting only the distinct ones).

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

Adding to 1212021011020 its reverse (201101202121), we get a palindrome (1413122213141).

The spelling of 1212021011020 in words is "one trillion, two hundred twelve billion, twenty-one million, eleven thousand, twenty".