1211345402 has 16 divisors (see below), whose sum is σ = 1852066080. Its totient is φ = 594037392.

The previous prime is 1211345363. The next prime is 1211345407. The reversal of 1211345402 is 2045431121.

It is not an unprimeable number, because it can be changed into a prime (1211345407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40688 + ... + 63860.

It is an arithmetic number, because the mean of its divisors is an integer number (115754130).

Almost surely, 2^1211345402 is an apocalyptic number.

1211345402 is a deficient number, since it is larger than the sum of its proper divisors (640720678).

1211345402 is a wasteful number, since it uses less digits than its factorization.

1211345402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23677.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1211345402 is about 34804.3876831643. The cubic root of 1211345402 is about 1065.9970390652.

Adding to 1211345402 its reverse (2045431121), we get a palindrome (3256776523).

The spelling of 1211345402 in words is "one billion, two hundred eleven million, three hundred forty-five thousand, four hundred two".