1021212101211 has 8 divisors (see below), whose sum is σ = 1371411935040. Its totient is φ = 675910167432.

The previous prime is 1021212101177. The next prime is 1021212101269. The reversal of 1021212101211 is 1121012121201.

It is a happy number.

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

It is not a de Polignac number, because 1021212101211 - 2¹¹ = 1021212099163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021212101011) 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, 1224474525 + ... + 1224475358.

It is an arithmetic number, because the mean of its divisors is an integer number (171426491880).

Almost surely, 2^{1021212101211} is an apocalyptic number.

1021212101211 is a deficient number, since it is larger than the sum of its proper divisors (350199833829).

1021212101211 is a wasteful number, since it uses less digits than its factorization.

1021212101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448950025.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1021212101211 its reverse (1121012121201), we get a palindrome (2142224222412).

The spelling of 1021212101211 in words is "one trillion, twenty-one billion, two hundred twelve million, one hundred one thousand, two hundred eleven".