1212442021340 has 48 divisors (see below), whose sum is σ = 2808803420640. Its totient is φ = 435934202880.

The previous prime is 1212442021337. The next prime is 1212442021367. The reversal of 1212442021340 is 431202442121.

It is a super-2 number, since 2×1212442021340² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 30941657 + ... + 30980816.

It is an arithmetic number, because the mean of its divisors is an integer number (58516737930).

Almost surely, 2^{1212442021340} is an apocalyptic number.

1212442021340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212442021340 is an abundant number, since it is smaller than the sum of its proper divisors (1596361399300).

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

1212442021340 is a wasteful number, since it uses less digits than its factorization.

1212442021340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61922582 (or 61922580 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 1212442021340 its reverse (431202442121), we get a palindrome (1643644463461).

The spelling of 1212442021340 in words is "one trillion, two hundred twelve billion, four hundred forty-two million, twenty-one thousand, three hundred forty".