1211212220019 has 16 divisors (see below), whose sum is σ = 1615937483424. Its totient is φ = 806981011200.

The previous prime is 1211212219981. The next prime is 1211212220027. The reversal of 1211212220019 is 9100222121121.

It is not a de Polignac number, because 1211212220019 - 2¹² = 1211212215923 is a prime.

It is a super-2 number, since 2×1211212220019² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211212220219) 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, 59243839 + ... + 59264279.

It is an arithmetic number, because the mean of its divisors is an integer number (100996092714).

Almost surely, 2^{1211212220019} is an apocalyptic number.

1211212220019 is a deficient number, since it is larger than the sum of its proper divisors (404725263405).

1211212220019 is a wasteful number, since it uses less digits than its factorization.

1211212220019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31558.

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 1211212220019 in words is "one trillion, two hundred eleven billion, two hundred twelve million, two hundred twenty thousand, nineteen".