1201921212 has 48 divisors (see below), whose sum is σ = 3020838912. Its totient is φ = 370856640.

The previous prime is 1201921207. The next prime is 1201921213. The reversal of 1201921212 is 2121291021.

It is a super-2 number, since 2×1201921212² = 2889229199711097888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201921213) 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, 61683 + ... + 78794.

It is an arithmetic number, because the mean of its divisors is an integer number (62934144).

Almost surely, 2^1201921212 is an apocalyptic number.

1201921212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1201921212 is an abundant number, since it is smaller than the sum of its proper divisors (1818917700).

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

1201921212 is a wasteful number, since it uses less digits than its factorization.

1201921212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140538 (or 140536 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1201921212 is about 34668.7353677633. The cubic root of 1201921212 is about 1063.2253758011.

The spelling of 1201921212 in words is "one billion, two hundred one million, nine hundred twenty-one thousand, two hundred twelve".