1212034434021 has 16 divisors (see below), whose sum is σ = 1795634452800. Its totient is φ = 808010408304.

The previous prime is 1212034434001. The next prime is 1212034434053. The reversal of 1212034434021 is 1204344302121.

1212034434021 is a `hidden beast` number, since 1 + 2 + 1 + 203 + 4 + 434 + 0 + 21 = 666.

It is not a de Polignac number, because 1212034434021 - 2⁵ = 1212034433989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212034434001) 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, 1625650 + ... + 2250956.

It is an arithmetic number, because the mean of its divisors is an integer number (112227153300).

Almost surely, 2^{1212034434021} is an apocalyptic number.

It is an amenable number.

1212034434021 is a deficient number, since it is larger than the sum of its proper divisors (583600018779).

1212034434021 is an equidigital number, since it uses as much as digits as its factorization.

1212034434021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697105 (or 697099 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 1212034434021 its reverse (1204344302121), we get a palindrome (2416378736142).

The spelling of 1212034434021 in words is "one trillion, two hundred twelve billion, thirty-four million, four hundred thirty-four thousand, twenty-one".