1213212001 has 8 divisors (see below), whose sum is σ = 1257824000. Its totient is φ = 1168942320.

The previous prime is 1213211999. The next prime is 1213212023. The reversal of 1213212001 is 1002123121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213212001 - 2¹ = 1213211999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213212031) 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, 78351 + ... + 92548.

It is an arithmetic number, because the mean of its divisors is an integer number (157228000).

Almost surely, 2^1213212001 is an apocalyptic number.

It is an amenable number.

1213212001 is a deficient number, since it is larger than the sum of its proper divisors (44611999).

1213212001 is a wasteful number, since it uses less digits than its factorization.

1213212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171159.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1213212001 is about 34831.1929310496. The cubic root of 1213212001 is about 1066.5443004920.

Adding to 1213212001 its reverse (1002123121), we get a palindrome (2215335122).

The spelling of 1213212001 in words is "one billion, two hundred thirteen million, two hundred twelve thousand, one".