1621115161212 has 48 divisors (see below), whose sum is σ = 3890607661472. Its totient is φ = 524985753600.

The previous prime is 1621115161201. The next prime is 1621115161213. The reversal of 1621115161212 is 2121615111261.

It is a super-2 number, since 2×1621115161212² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1621115161212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621115161213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2413789 + ... + 3011412.

Almost surely, 2^{1621115161212} is an apocalyptic number.

1621115161212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1621115161212 is an abundant number, since it is smaller than the sum of its proper divisors (2269492500260).

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

1621115161212 is a wasteful number, since it uses less digits than its factorization.

1621115161212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5425918 (or 5425916 counting only the distinct ones).

The product of its digits is 1440, while the sum is 30.

The spelling of 1621115161212 in words is "one trillion, six hundred twenty-one billion, one hundred fifteen million, one hundred sixty-one thousand, two hundred twelve".