1212653211 has 16 divisors (see below), whose sum is σ = 2015839488. Its totient is φ = 629949600.

The previous prime is 1212653209. The next prime is 1212653227. The reversal of 1212653211 is 1123562121.

It is a happy number.

It is not a de Polignac number, because 1212653211 - 2¹ = 1212653209 is a prime.

It is a super-2 number, since 2×1212653211² = 2941055620297221042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1212653291) 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, 2624560 + ... + 2625021.

It is an arithmetic number, because the mean of its divisors is an integer number (125989968).

Almost surely, 2^1212653211 is an apocalyptic number.

1212653211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212653211 is a deficient number, since it is larger than the sum of its proper divisors (803186277).

1212653211 is a wasteful number, since it uses less digits than its factorization.

1212653211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5249602.

The product of its digits is 720, while the sum is 24.

The square root of 1212653211 is about 34823.1706052163. The cubic root of 1212653211 is about 1066.3805297710.

The spelling of 1212653211 in words is "one billion, two hundred twelve million, six hundred fifty-three thousand, two hundred eleven".