1211320002 has 16 divisors (see below), whose sum is σ = 2474186112. Its totient is φ = 395182320.

The previous prime is 1211319997. The next prime is 1211320007. The reversal of 1211320002 is 2000231121.

It is an interprime number because it is at equal distance from previous prime (1211319997) and next prime (1211320007).

It is a super-2 number, since 2×1211320002² = 2934592294490560008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211320002.

It is not an unprimeable number, because it can be changed into a prime (1211320007) 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, 2147449 + ... + 2148012.

It is an arithmetic number, because the mean of its divisors is an integer number (154636632).

Almost surely, 2^1211320002 is an apocalyptic number.

1211320002 is an abundant number, since it is smaller than the sum of its proper divisors (1262866110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211320002 is a wasteful number, since it uses less digits than its factorization.

1211320002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4295513.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1211320002 is about 34804.0227847299. The cubic root of 1211320002 is about 1065.9895882550.

Adding to 1211320002 its reverse (2000231121), we get a palindrome (3211551123).

The spelling of 1211320002 in words is "one billion, two hundred eleven million, three hundred twenty thousand, two".