1210212012011 has 4 divisors (see below), whose sum is σ = 1281400953912. Its totient is φ = 1139023070112.

The previous prime is 1210212011989. The next prime is 1210212012013. The reversal of 1210212012011 is 1102102120121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1210212012011 - 2¹⁸ = 1210211749867 is a prime.

It is a super-2 number, since 2×1210212012011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210212012013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35594470925 + ... + 35594470958.

It is an arithmetic number, because the mean of its divisors is an integer number (320350238478).

Almost surely, 2^{1210212012011} is an apocalyptic number.

1210212012011 is a deficient number, since it is larger than the sum of its proper divisors (71188941901).

1210212012011 is an equidigital number, since it uses as much as digits as its factorization.

1210212012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71188941900.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1210212012011 its reverse (1102102120121), we get a palindrome (2312314132132).

The spelling of 1210212012011 in words is "one trillion, two hundred ten billion, two hundred twelve million, twelve thousand, eleven".