1021212219 has 16 divisors (see below), whose sum is σ = 1443902112. Its totient is φ = 639787008.

The previous prime is 1021212211. The next prime is 1021212233. The reversal of 1021212219 is 9122121201.

It is not a de Polignac number, because 1021212219 - 2³ = 1021212211 is a prime.

It is a super-2 number, since 2×1021212219² = 2085748792469807922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1021212195 and 1021212204.

It is not an unprimeable number, because it can be changed into a prime (1021212211) 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, 19447 + ... + 49199.

It is an arithmetic number, because the mean of its divisors is an integer number (90243882).

Almost surely, 2^1021212219 is an apocalyptic number.

1021212219 is a deficient number, since it is larger than the sum of its proper divisors (422689893).

1021212219 is a wasteful number, since it uses less digits than its factorization.

1021212219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30446.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1021212219 is about 31956.4112346803. The cubic root of 1021212219 is about 1007.0213252766.

The spelling of 1021212219 in words is "one billion, twenty-one million, two hundred twelve thousand, two hundred nineteen".