121210001213 has 16 divisors (see below), whose sum is σ = 141973216896. Its totient is φ = 101311119360.

The previous prime is 121210001203. The next prime is 121210001221. The reversal of 121210001213 is 312100012121.

It is a cyclic number.

It is not a de Polignac number, because 121210001213 - 2¹⁶ = 121209935677 is a prime.

It is a super-2 number, since 2×121210001213² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210001203) 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, 496445 + ... + 699197.

It is an arithmetic number, because the mean of its divisors is an integer number (8873326056).

Almost surely, 2^121210001213 is an apocalyptic number.

It is an amenable number.

121210001213 is a deficient number, since it is larger than the sum of its proper divisors (20763215683).

121210001213 is a wasteful number, since it uses less digits than its factorization.

121210001213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204884.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 121210001213 its reverse (312100012121), we get a palindrome (433310013334).

The spelling of 121210001213 in words is "one hundred twenty-one billion, two hundred ten million, one thousand, two hundred thirteen".