1211210020434 has 16 divisors (see below), whose sum is σ = 2423196246240. Its totient is φ = 403607305920.

The previous prime is 1211210020421. The next prime is 1211210020441. The reversal of 1211210020434 is 4340200121121.

It is a super-3 number, since 3×1211210020434³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211210020434.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32321604 + ... + 32359055.

It is an arithmetic number, because the mean of its divisors is an integer number (151449765390).

Almost surely, 2^{1211210020434} is an apocalyptic number.

1211210020434 is an abundant number, since it is smaller than the sum of its proper divisors (1211986225806).

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

1211210020434 is a wasteful number, since it uses less digits than its factorization.

1211210020434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64683785.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1211210020434 its reverse (4340200121121), we get a palindrome (5551410141555).

The spelling of 1211210020434 in words is "one trillion, two hundred eleven billion, two hundred ten million, twenty thousand, four hundred thirty-four".